body,
p,
a,
aside,
section,
header,
footer,
nav,
article,
span,
i,
b,
em,
ul,
li,
input {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  list-style: none;
  text-decoration: none;
  font-size: 12px;
  font-family: 'Microsoft YaHei', 'Arial';
}
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 500;
}
h1,
h2,
h3 {
  margin-top: 20px;
  margin-bottom: 10px;
}
h1 {
  font-size: 36px;
}
h2 {
  font-size: 30px;
}
h3 {
  font-size: 24px;
  color: #575757;
}
h4,
h5,
h6 {
  margin-top: 10px;
  margin-bottom: 10px;
}
h4 {
  font-size: 18px;
}
h5 {
  font-size: 14px;
}
h6 {
  font-size: 12px;
}
